Factual error: In the closing scene, E.J. Bellocq pictures Hattie and Violet with a Kodak Portrait Brownie No. 2. The Kodak Portrait Brownie No. 2 was not introduced until 1929, a dozen years after the movie takes place.
Factual error: In the 1953 sequence when the headmaster is driving Fiona and Paul home, the yellow car parked in the road is a Vauxhall Viva HC, which didn't start production until 1970.